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net/smc: introduce System Enterprise ID (SEID)

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SMCD version 2 defines a System Enterprise ID (short SEID).
This patch contains the SEID creation and adds the callback to
retrieve the created SEID.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun
2020-09-26 12:44:24 +02:00
committed by David S. Miller
parent 3fc6493761
commit 201091ebb2
6 changed files with 73 additions and 2 deletions
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21
net/smc/smc_ism.c
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@@ -21,7 +21,9 @@ struct smcd_dev_list smcd_dev_list = {
.mutex = __MUTEX_INITIALIZER(smcd_dev_list.mutex)
};
/* Test if an ISM communication is possible. */
bool smc_ism_v2_capable;
/* Test if an ISM communication is possible - same CPC */
int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *smcd)
{
return smcd->ops->query_remote_gid(smcd, peer_gid, vlan_id ? 1 : 0,
@@ -39,6 +41,11 @@ int smc_ism_write(struct smcd_dev *smcd, const struct smc_ism_position *pos,
return rc < 0 ? rc : 0;
}
void smc_ism_get_system_eid(struct smcd_dev *smcd, u8 **eid)
{
smcd->ops->get_system_eid(smcd, eid);
}
/* Set a connection using this DMBE. */
void smc_ism_set_conn(struct smc_connection *conn)
{
@@ -319,6 +326,13 @@ EXPORT_SYMBOL_GPL(smcd_alloc_dev);
int smcd_register_dev(struct smcd_dev *smcd)
{
mutex_lock(&smcd_dev_list.mutex);
if (list_empty(&smcd_dev_list.list)) {
u8 *system_eid = NULL;
smc_ism_get_system_eid(smcd, &system_eid);
if ((*system_eid) + 24 != '0' || (*system_eid) + 28 != '0')
smc_ism_v2_capable = true;
}
list_add_tail(&smcd->list, &smcd_dev_list.list);
mutex_unlock(&smcd_dev_list.mutex);
@@ -399,3 +413,8 @@ void smcd_handle_irq(struct smcd_dev *smcd, unsigned int dmbno)
spin_unlock_irqrestore(&smcd->lock, flags);
}
EXPORT_SYMBOL_GPL(smcd_handle_irq);
void __init smc_ism_init(void)
{
smc_ism_v2_capable = false;
}